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com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer Maven / Gradle / Ivy
General data-binding functionality for Jackson: works on core streaming API
package com.fasterxml.jackson.databind.ser.std;
import java.io.IOException;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.annotation.JacksonStdImpl;
import com.fasterxml.jackson.databind.introspect.AnnotatedMember;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonArrayFormatVisitor;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatVisitorWrapper;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
import com.fasterxml.jackson.databind.ser.ContainerSerializer;
import com.fasterxml.jackson.databind.ser.ContextualSerializer;
import com.fasterxml.jackson.databind.ser.impl.PropertySerializerMap;
/**
* Generic serializer for Object arrays (Object[]).
*/
@JacksonStdImpl
@SuppressWarnings("serial")
public class ObjectArraySerializer
extends ArraySerializerBase
implements ContextualSerializer
{
/**
* Whether we are using static typing (using declared types, ignoring
* runtime type) or not for elements.
*/
protected final boolean _staticTyping;
/**
* Declared type of element entries
*/
protected final JavaType _elementType;
/**
* Type serializer to use for values, if any.
*/
protected final TypeSerializer _valueTypeSerializer;
/**
* Value serializer to use, if it can be statically determined.
*/
protected JsonSerializer _elementSerializer;
/**
* If element type cannot be statically determined, mapping from
* runtime type to serializer is handled using this object
*/
protected PropertySerializerMap _dynamicSerializers;
/*
/**********************************************************
/* Life-cycle
/**********************************************************
*/
public ObjectArraySerializer(JavaType elemType, boolean staticTyping,
TypeSerializer vts, JsonSerializer elementSerializer)
{
super(Object[].class);
_elementType = elemType;
_staticTyping = staticTyping;
_valueTypeSerializer = vts;
_dynamicSerializers = PropertySerializerMap.emptyForProperties();
_elementSerializer = elementSerializer;
}
public ObjectArraySerializer(ObjectArraySerializer src, TypeSerializer vts)
{
super(src);
_elementType = src._elementType;
_valueTypeSerializer = vts;
_staticTyping = src._staticTyping;
// 22-Nov-2018, tatu: probably safe (even with [databind#2181]) since it's just
// inclusion, type serializer but NOT serializer
_dynamicSerializers = src._dynamicSerializers;
_elementSerializer = src._elementSerializer;
}
@SuppressWarnings("unchecked")
public ObjectArraySerializer(ObjectArraySerializer src,
BeanProperty property, TypeSerializer vts, JsonSerializer elementSerializer,
Boolean unwrapSingle)
{
super(src, property, unwrapSingle);
_elementType = src._elementType;
_valueTypeSerializer = vts;
_staticTyping = src._staticTyping;
// [databind#2181]: may not be safe to reuse, start from empty
_dynamicSerializers = PropertySerializerMap.emptyForProperties();
_elementSerializer = (JsonSerializer) elementSerializer;
}
@Override
public JsonSerializer _withResolved(BeanProperty prop, Boolean unwrapSingle) {
return new ObjectArraySerializer(this, prop,
_valueTypeSerializer, _elementSerializer, unwrapSingle);
}
@Override
public ContainerSerializer _withValueTypeSerializer(TypeSerializer vts) {
return new ObjectArraySerializer(_elementType, _staticTyping, vts, _elementSerializer);
}
public ObjectArraySerializer withResolved(BeanProperty prop,
TypeSerializer vts, JsonSerializer ser, Boolean unwrapSingle) {
if ((_property == prop) && (ser == _elementSerializer)
&& (_valueTypeSerializer == vts) && (_unwrapSingle == unwrapSingle)) {
return this;
}
return new ObjectArraySerializer(this, prop, vts, ser, unwrapSingle);
}
/*
/**********************************************************
/* Post-processing
/**********************************************************
*/
@Override
public JsonSerializer createContextual(SerializerProvider serializers,
BeanProperty property)
throws JsonMappingException
{
TypeSerializer vts = _valueTypeSerializer;
if (vts != null) {
vts = vts.forProperty(property);
}
JsonSerializer ser = null;
Boolean unwrapSingle = null;
// First: if we have a property, may have property-annotation overrides
if (property != null) {
AnnotatedMember m = property.getMember();
final AnnotationIntrospector intr = serializers.getAnnotationIntrospector();
if (m != null) {
Object serDef = intr.findContentSerializer(m);
if (serDef != null) {
ser = serializers.serializerInstance(m, serDef);
}
}
}
JsonFormat.Value format = findFormatOverrides(serializers, property, handledType());
if (format != null) {
unwrapSingle = format.getFeature(JsonFormat.Feature.WRITE_SINGLE_ELEM_ARRAYS_UNWRAPPED);
}
if (ser == null) {
ser = _elementSerializer;
}
// [databind#124]: May have a content converter
ser = findContextualConvertingSerializer(serializers, property, ser);
if (ser == null) {
// 30-Sep-2012, tatu: One more thing -- if explicit content type is annotated,
// we can consider it a static case as well.
if (_elementType != null) {
if (_staticTyping && !_elementType.isJavaLangObject()) {
ser = serializers.findValueSerializer(_elementType, property);
}
}
}
return withResolved(property, vts, ser, unwrapSingle);
}
/*
/**********************************************************
/* Accessors
/**********************************************************
*/
@Override
public JavaType getContentType() {
return _elementType;
}
@Override
public JsonSerializer getContentSerializer() {
return _elementSerializer;
}
@Override
public boolean isEmpty(SerializerProvider prov, Object[] value) {
return value.length == 0;
}
@Override
public boolean hasSingleElement(Object[] value) {
return (value.length == 1);
}
/*
/**********************************************************
/* Actual serialization
/**********************************************************
*/
@Override
public final void serialize(Object[] value, JsonGenerator gen, SerializerProvider provider) throws IOException
{
final int len = value.length;
if (len == 1) {
if (((_unwrapSingle == null) &&
provider.isEnabled(SerializationFeature.WRITE_SINGLE_ELEM_ARRAYS_UNWRAPPED))
|| (_unwrapSingle == Boolean.TRUE)) {
serializeContents(value, gen, provider);
return;
}
}
gen.writeStartArray(len);
serializeContents(value, gen, provider);
gen.writeEndArray();
}
@Override
public void serializeContents(Object[] value, JsonGenerator gen, SerializerProvider provider) throws IOException
{
final int len = value.length;
if (len == 0) {
return;
}
if (_elementSerializer != null) {
serializeContentsUsing(value, gen, provider, _elementSerializer);
return;
}
if (_valueTypeSerializer != null) {
serializeTypedContents(value, gen, provider);
return;
}
int i = 0;
Object elem = null;
try {
PropertySerializerMap serializers = _dynamicSerializers;
for (; i < len; ++i) {
elem = value[i];
if (elem == null) {
provider.defaultSerializeNull(gen);
continue;
}
Class cc = elem.getClass();
JsonSerializer serializer = serializers.serializerFor(cc);
if (serializer == null) {
if (_elementType.hasGenericTypes()) {
serializer = _findAndAddDynamic(serializers,
provider.constructSpecializedType(_elementType, cc), provider);
} else {
serializer = _findAndAddDynamic(serializers, cc, provider);
}
}
serializer.serialize(elem, gen, provider);
}
} catch (Exception e) {
wrapAndThrow(provider, e, elem, i);
}
}
public void serializeContentsUsing(Object[] value, JsonGenerator jgen, SerializerProvider provider,
JsonSerializer ser) throws IOException
{
final int len = value.length;
final TypeSerializer typeSer = _valueTypeSerializer;
int i = 0;
Object elem = null;
try {
for (; i < len; ++i) {
elem = value[i];
if (elem == null) {
provider.defaultSerializeNull(jgen);
continue;
}
if (typeSer == null) {
ser.serialize(elem, jgen, provider);
} else {
ser.serializeWithType(elem, jgen, provider, typeSer);
}
}
} catch (Exception e) {
wrapAndThrow(provider, e, elem, i);
}
}
public void serializeTypedContents(Object[] value, JsonGenerator jgen, SerializerProvider provider) throws IOException
{
final int len = value.length;
final TypeSerializer typeSer = _valueTypeSerializer;
int i = 0;
Object elem = null;
try {
PropertySerializerMap serializers = _dynamicSerializers;
for (; i < len; ++i) {
elem = value[i];
if (elem == null) {
provider.defaultSerializeNull(jgen);
continue;
}
Class cc = elem.getClass();
JsonSerializer serializer = serializers.serializerFor(cc);
if (serializer == null) {
serializer = _findAndAddDynamic(serializers, cc, provider);
}
serializer.serializeWithType(elem, jgen, provider, typeSer);
}
} catch (Exception e) {
wrapAndThrow(provider, e, elem, i);
}
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
JsonArrayFormatVisitor arrayVisitor = visitor.expectArrayFormat(typeHint);
if (arrayVisitor != null) {
JavaType contentType = _elementType;
// [databind#1793]: Was getting `null` for `typeHint`. But why would we even use it...
/*
TypeFactory tf = visitor.getProvider().getTypeFactory();
contentType = tf.moreSpecificType(_elementType, typeHint.getContentType());
if (contentType == null) {
visitor.getProvider().reportBadDefinition(_elementType,
"Could not resolve type: "+_elementType);
}
*/
JsonSerializer valueSer = _elementSerializer;
if (valueSer == null) {
valueSer = visitor.getProvider().findValueSerializer(contentType, _property);
}
arrayVisitor.itemsFormat(valueSer, contentType);
}
}
protected final JsonSerializer _findAndAddDynamic(PropertySerializerMap map,
Class type, SerializerProvider provider) throws JsonMappingException
{
PropertySerializerMap.SerializerAndMapResult result = map.findAndAddSecondarySerializer(type, provider, _property);
// did we get a new map of serializers? If so, start using it
if (map != result.map) {
_dynamicSerializers = result.map;
}
return result.serializer;
}
protected final JsonSerializer _findAndAddDynamic(PropertySerializerMap map,
JavaType type, SerializerProvider provider) throws JsonMappingException
{
PropertySerializerMap.SerializerAndMapResult result = map.findAndAddSecondarySerializer(type, provider, _property);
// did we get a new map of serializers? If so, start using it
if (map != result.map) {
_dynamicSerializers = result.map;
}
return result.serializer;
}
}
